docs(readme): use the remote asset link

Author: wardvisual

README.md

@@ -2,7 +2,7 @@
 
 A **lightweight PHP framework** inspired by Laravel, designed for developers who appreciate simplicity and direct access to the PHP language.
 
-![WarvilPHP](public\assets\warvilphp.jpg)
+![WarvilPHP](https://raw.githubusercontent.com/wardvisual/warvilphp/refs/heads/main/public/assets/warvilphp.jpg)
 
 <p align="center">
   <img src="https://img.shields.io/badge/PHP-v8.0+-blue.svg" alt="PHP Version">